US11941711B2ActiveUtilityA1
Centralized cloud energy storage system and transaction settlement method thereof, storage medium, and terminal
Est. expiryJun 18, 2039(~12.9 yrs left)· nominal 20-yr term from priority
H02J 7/855G06Q 50/06H02J 3/008H02J 3/32G06Q 30/0283G06Q 30/0605G07F 15/008Y04S50/10Y04S50/16
46
PatentIndex Score
0
Cited by
13
References
8
Claims
Abstract
Disclosed is a centralized cloud energy storage system for massive and distributed users and a transaction settlement method thereof, a storage medium, and a terminal. The system includes: a centralized energy storage facility invested and operated by a cloud energy storage service provider; the massive and distributed users; and a power network and a user energy management system connecting the centralized energy storage facility with the massive and distributed users. A user sends a charging and discharging request to the cloud energy storage service provider through the user energy management system, and the cloud energy storage service provider issues a charging and discharging instruction to the centralized cloud energy storage system.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A centralized cloud energy storage system for massive and distributed users, comprising: a centralized energy storage facility invested and operated by a cloud energy storage service provider; the massive and distributed users; and a power network and a user energy management system connecting the centralized energy storage facility with the massive and distributed users, wherein
the centralized energy storage facility is electrically connected to each of the massive and distributed users through the power network, to replace local energy storage facilities for the distributed users,
the user energy management system is communicatively connected to each of the massive and distributed users, to receive a charging and discharging request sent by the user to the cloud energy storage service provider,
the user energy management system issues, based on the received charging and discharging request, a charging and discharging instruction to the centralized energy storage facility, to control the centralized energy storage facility to receive power from and supply power to the user through the power network, wherein
the cloud energy storage service provider utilizes complementarity and non-simultaneity of charging and discharging requirements among the massive and distributed users to achieve energy capacity and power capacity of an energy storage facility invested and constructed by the cloud energy storage service provider being respectively lower than a sum of energy capacity requirements and a sum of power capacity requirements of all distributed users in the centralized cloud energy storage system,
a charging power demand p i,t C and a discharging power demand p i,t D in a time period of t decided by a cloud energy storage user i on his/her own, as well as a power p i,t C,DG of charging using local distributed energy sources need to meet:
{
p
i
,
t
C
·
p
i
,
t
D
=
0
p
i
,
t
C
,
p
i
,
t
D
,
p
i
,
t
c
,
DG
≥
0
p
i
,
t
C
≤
min
{
p
i
C
a
p
,
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a
p
-
(
1
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s
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e
i
,
t
-
1
Δ
t
η
C
}
p
i
,
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≤
max
{
0
,
min
{
p
i
C
a
p
,
η
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[
(
1
-
s
)
e
i
,
t
-
1
-
SOC
Min
·
e
i
C
a
p
]
Δ
t
}
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p
i
,
t
D
,
DG
≤
min
{
p
i
,
t
DG
,
p
i
,
t
C
}
where p i Cap denotes a power capacity of a cloud energy storage service obtained by the cloud energy storage user i, e i Cap denotes an energy capacity obtained by the cloud energy storage user i, SOC Min denotes a minimum state of charge, S denotes a self-discharge rate, η c denotes a charging efficiency, η D denotes a discharging efficiency, Δt denotes a time interval of each time period, P i,t DG denotes a generation power of the local distributed energy sources of the cloud energy storage user i in the time period of t, and e i,t denotes an electric quantity of the cloud energy storage service of the cloud energy storage user i at the end of the time period of t.
2. The system of claim 1 , wherein the centralized energy storage facility comprises a combined energy storage facility comprising any one or more of: a lead-acid battery, a nickel-cadmium battery, a nickel chloride battery, a sodium-sulfur battery, a lithium-ion battery, a zinc-bromine battery, a flow battery, compressed air energy storage, flywheel energy storage, thermal energy storage, a zinc-air battery, supercapacitor energy storage, and superconducting magnetic energy storage.
3. A transaction settlement method based on the centralized cloud energy storage system of claim 1 , comprising:
providing, by the cloud energy storage service provider, the user with a cloud energy storage service, and setting, by the cloud energy storage service provider, a service fee per unit power capacity of the cloud energy storage service used by the user, a service fee per unit energy capacity, an initial state of charge of the cloud energy storage service, a minimum state of charge, a self-discharge rate, a charging efficiency, and a discharging efficiency, in a range of sets of time;
determining, by the user, to purchase the cloud energy storage service from the cloud energy storage service provider depending on his/her own actual situation to obtain a corresponding power capacity and energy capacity;
deciding, by the user on his/her own, a charging power demand and a discharging power demand in a time period of t and a power of charging using local distributed energy sources, and sending, by the user on his/her own, a request to the cloud energy storage service provider;
deciding, by the cloud energy storage service provider, a charging power and a discharging power in the time period of t of a k-th type of energy storage facility invested and operated by the cloud energy storage service provider based on information collected by the cloud energy storage service provider, and issuing, by the cloud energy storage service provider, instructions for a charging power and a discharging power to the centralized energy storage facility; and
conducting, by the cloud energy storage service provider, a settlement of an operating expense with the user and the power grid.
4. The transaction settlement method of claim 3 , wherein the settlement of the operating expense comprises: an electricity fee that the cloud energy storage service provider pays to the power grid when obtaining electricity from the power grid, an electricity fee paid by the power grid to the cloud energy storage service provider when the cloud energy storage service provider returns power to the power grid, a wheeling fee of a power transmission and distribution network that the cloud energy storage service provider pays to the power grid when carrying out the cloud energy storage service, and an electricity fee that a cloud energy storage user pays to the power grid when obtaining electricity from the power grid.
5. A computer-readable storage medium having a computer program instruction stored thereon, the computer program instruction being adapted to be loaded by a processor and implement the transaction settlement method of claim 3 .
6. A mobile terminal, comprising a processor and a memory, the processor being configured to execute a program stored in the memory to implement the transaction settlement method of claim 3 .
7. The system of claim 1 , wherein an operating expense C O paid by the cloud energy storage service provider to a power grid is obtained through a formula as:
C
O
=
∑
t
∈
T
Δ
t
[
λ
t
(
∑
k
∈
K
P
k
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C
-
∑
k
∈
K
P
k
,
t
D
+
,
∑
i
∈
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p
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+
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θ
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(
∑
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-
∑
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k
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+
∑
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S
p
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)
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+
Δ
C
,
where (·) + and (·) − respectively defined as taking a positive part and a negative part in parentheses, namely:
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+
=
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≥
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T denotes a set of times, K denotes a set of centralized energy storage facilities, k denotes a k-th type of centralized energy storage facility, S CES denotes a set of cloud energy storage users, λ t denotes an electricity fee that the cloud energy storage service provider pays to the power grid when obtaining electricity from the power grid in the time period of t, θ t denotes an electricity fee paid by the power grid to the cloud energy storage service provider when the cloud energy storage service provider returns power to the power grid in the time period of t, P k,t C and P k,t D respectively denote a charging power and a discharging power in the time period of t of the k-th type of energy storage facility, and ΔC denotes a wheeling fee of a power transmission and distribution network that the cloud energy storage service provider pays to the power grid when carrying out the cloud energy storage service.
8. The system of claim 1 , wherein the user pays an operating expense C i C,CES to the cloud energy storage service provider, and the operating expense is obtained through a formula as:
C
i
C
,
CES
=
∑
t
∈
T
λ
i
,
t
(
p
i
,
t
C
-
p
i
,
t
C
,
DG
)
Δ
t
,
where λ i,t denotes an electricity fee that the cloud energy storage user pays to the power grid when obtaining electricity from the power grid during the time period of t, and T denotes a set of times.Cited by (0)
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